Here's a basic Acu-Rite setup.




On the left is the actual unit. What it reads will show up on the screen as the IN temp aka the cool side.

On right you can see the thin black probe cord. The probe itself is tucked just inside the hide (it won't bother your snake). What it reads will show up on the screen as the OUT temp aka the warm side inside the hide.

Also on the screen you will see overall humidity.

You can either bury the long probe cord under the substrate or lead it out and back into the tub from one end to the other (I prefer that, keeps it out of the snake's way). If you feed live, remember to remove the Acu-Rite before putting a live rodent in the enclosure. If your snake poops or pees on the probe, just wipe it clean with a baby butt wipe.